According to TMZ, what has authorities suspicious is that the doctor at Kelly's rehab told the coroner that the former "That '70s Show" star died from an embolism. However, sources told the website that the coroner immediately rejected the doctor's conclusion because that's a diagnosis that would have first required an autopsy.

Kelly had a history of drug and alcohol abuse, but was trying to get clean at the time of her death. According to the website she was taking detox medication, but it is not clear if drugs played a role in her death.